.main {
  height: 100%;
  background: url(../image/home/home_bg.png) center top no-repeat;
  background-size: 100% 100%;
}

.main .nav {
  height: 80px;
  background: url(../image/header_bg.png) left top no-repeat;
  background-size: 100% 100%;
  padding-right: 50px;
}

.main .nav .title_image {
  width: 429px;
  height: 78px;
}

.main .nav > ul li {
  height: 65px;
  line-height: 65px;
  margin-left: 30px;
}

.main .nav > ul li > a {
  font-size: 16px;
  color: #5BBAFF;
}

.main .nav > ul li > a.acitve {
  font-weight: bold;
  color: #5BD8FF;
}

.main .iframe_box iframe {
  width: 100%;
}
